Patents by Inventor Johannes H. Ottenheym

Johannes H. Ottenheym has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for removing heavy metals from solutions
    Patent number: 3931002
    Abstract: A process for removal of heavy metals from solutions or gaseous mixtures is disclosed, wherein the solutions or gaseous mixtures are contacted with a suitable sulphur-containing reagent consisting of:A. reduced keratin,B. Bunte salts of keratin,C. natural or synthetic polyamides at least part of whose amide groups has been replaced by thio-amide groups, whereupon the loaded reagent is separated off.The process is suitable for the purification of waste water, whose discharge on the surface waters is objectionable.
    Type: Grant
    Filed: June 18, 1973
    Date of Patent: January 6, 1976
    Assignee: Stamicarbon B.V.
    Inventors: Johannes H. Ottenheym, Bernardus H. N. Dassen